symbian/QQrDecoder/QCameraControllerWidget.cpp

   1 #include "QCameraControllerWidget.h"\r
   2 #include <QPainter>\r
   3 \r
   4 QCameraControllerWidget::QCameraControllerWidget(QWidget* parent) : QWidget(parent),\r
   5 iCameraWrapper(NULL), iBackBuffer(NULL), iBackBufferDevice(NULL), iBackBufferContext(NULL)\r
   6 {\r
   7     timer = new QTimer(this);\r
   8     connect(timer, SIGNAL(timeout()), this, SLOT(sendBackbufferToDecode()));\r
   9     timer->start(500);\r
  10 }\r
  11 \r
  12 QCameraControllerWidget::~QCameraControllerWidget()\r
  13 {\r
  14     if (iCameraWrapper)\r
  15     {\r
  16         iCameraWrapper->ReleaseAndPowerOff();\r
  17     }\r
  18 \r
  19     delete iCameraWrapper;\r
  20 \r
  21     if(timer)\r
  22     {\r
  23         delete timer;\r
  24         timer = NULL;\r
  25     }\r
  26 \r
  27     ReleaseBackBuffer();\r
  28 }\r
  29 \r
  30 void QCameraControllerWidget::CaptureImage()\r
  31 {\r
  32     if (iCameraWrapper && iCameraWrapper->State() == CCameraEngine::EEngineViewFinding)\r
  33     {\r
  34         emit logMessage("Capturing picture");\r
  35         iCameraWrapper->StopViewFinder();\r
  36         TRAPD(err,iCameraWrapper->CaptureL());\r
  37         if (err)\r
  38         {\r
  39             emit logMessage("Camera capture error");                    \r
  40         }\r
  41     }\r
  42 }\r
  43 \r
  44 void QCameraControllerWidget::paintEvent(QPaintEvent* event)\r
  45 {\r
  46     if(iBackBuffer)\r
  47     {\r
  48         QPainter paint(this);\r
  49         paint.drawPixmap(0,0,QPixmap::fromSymbianCFbsBitmap(iBackBuffer));\r
  50     }\r
  51 }\r
  52 \r
  53 void QCameraControllerWidget::resizeEvent(QResizeEvent* event)\r
  54 {\r
  55     static int savedWidth = 0;\r
  56     static int savedHeight = 0;\r
  57     \r
  58     if(!savedWidth || !savedHeight)\r
  59     {\r
  60         InitializeCamera();\r
  61         savedWidth = geometry().width();\r
  62         savedHeight = geometry().height();\r
  63     }\r
  64 }\r
  65 \r
  66 void QCameraControllerWidget::InitializeCamera()\r
  67 {\r
  68     // Create camera wrapper class here because\r
  69     // whole camera wrapper and all handles have to reset\r
  70     // while orientatio of the application changes.\r
  71     if (iCameraWrapper)\r
  72     {\r
  73         // Power off camera if it is on\r
  74         iCameraWrapper->StopViewFinder();\r
  75         iCameraWrapper->ReleaseAndPowerOff();\r
  76         delete iCameraWrapper; iCameraWrapper = NULL;\r
  77     }\r
  78     TInt camErr(KErrNotSupported);\r
  79     if(CCameraEngine::CamerasAvailable() > 0)\r
  80     {\r
  81         TRAP(camErr, iCameraWrapper = CCameraEngine::NewL(0,0,this));\r
  82     }\r
  83 \r
  84     // iViewFinderSize is picture size for viewfinder.\r
  85     // iCaptureSize is picture size for capturing picture.\r
  86     // We want fill whole screen\r
  87     if (geometry().width() > geometry().height())\r
  88     {\r
  89         iViewFinderSize = TSize(geometry().width(),geometry().width());\r
  90         iCaptureSize = TSize(geometry().width(),geometry().width()); // Captured picture size\r
  91     }\r
  92     else\r
  93     {\r
  94         iViewFinderSize = TSize(geometry().height(), geometry().height());\r
  95         iCaptureSize = TSize(geometry().height(),geometry().height()); // Captured picture size\r
  96     }\r
  97 \r
  98     // Create back buffer where recieved camera pictures are copied\r
  99     ReleaseBackBuffer();\r
 100     CreateBackBufferL();\r
 101 \r
 102     // Power on camera, start viewfinder when MceoCameraReady() received\r
 103     if(camErr == KErrNone)\r
 104     {\r
 105         iCameraWrapper->ReserveAndPowerOn();    \r
 106         emit logMessage("Camera power on");\r
 107     }\r
 108     else\r
 109     {\r
 110         emit logMessage("no camera found");\r
 111     }\r
 112 }\r
 113 \r
 114 void QCameraControllerWidget::CreateBackBufferL()\r
 115 {\r
 116     // create back buffer bitmap\r
 117     iBackBuffer = q_check_ptr(new CFbsBitmap);\r
 118 \r
 119     try{\r
 120         TSize size;\r
 121         size.iHeight = this->geometry().height();\r
 122         size.iWidth = this->geometry().width();\r
 123         QT_TRAP_THROWING( iBackBuffer->Create(size,EColor64K));\r
 124     }\r
 125     catch(std::exception& e)\r
 126     {\r
 127 \r
 128     }\r
 129 \r
 130     // create back buffer graphics context\r
 131     iBackBufferDevice = CFbsBitmapDevice::NewL(iBackBuffer);\r
 132     User::LeaveIfError(iBackBufferDevice->CreateContext(iBackBufferContext));\r
 133     iBackBufferContext->SetPenStyle(CGraphicsContext::ESolidPen);\r
 134 \r
 135     iBackBufferContext->SetBrushColor(KRgbBlack);\r
 136     iBackBufferContext->Clear();\r
 137 }\r
 138 \r
 139 void QCameraControllerWidget::ReleaseBackBuffer()\r
 140 {\r
 141     if (iBackBufferContext)\r
 142     {\r
 143         delete iBackBufferContext;\r
 144         iBackBufferContext = NULL;\r
 145     }\r
 146     if (iBackBufferDevice)\r
 147     {\r
 148         delete iBackBufferDevice;\r
 149         iBackBufferDevice = NULL;\r
 150     }\r
 151     if (iBackBuffer)\r
 152     {\r
 153         delete iBackBuffer;\r
 154         iBackBuffer = NULL;\r
 155     }\r
 156 }\r
 157 \r
 158 void QCameraControllerWidget::MceoCameraReady()\r
 159 {\r
 160     if (iCameraWrapper->State() == CCameraEngine::EEngineIdle)\r
 161     {\r
 162         // Prepare camera\r
 163         TSize imageSize;\r
 164         imageSize.iHeight = 480;\r
 165         imageSize.iWidth = 640;\r
 166 \r
 167         CCamera::TFormat format = CCamera::EFormatFbsBitmapColor64K;\r
 168 \r
 169         TRAPD(err,iCameraWrapper->PrepareL(imageSize, format));\r
 170         if (err)\r
 171         {\r
 172             emit logMessage("Camera prepare error");\r
 173             return;\r
 174         }\r
 175 \r
 176         // Start viewfinder. Viewfinder pictures starts coming into MceoViewFinderFrameReady();\r
 177 \r
 178         TSize finderSize;\r
 179         finderSize.iHeight = this->geometry().height();\r
 180         finderSize.iWidth = this->geometry().width();\r
 181         TRAPD(err2,iCameraWrapper->StartViewFinderL(finderSize));\r
 182         if (err2)\r
 183         {\r
 184             emit logMessage("Camera start viewfinder error");\r
 185             return;\r
 186         }\r
 187 \r
 188         emit logMessage("Camera viewfinder started");\r
 189     }\r
 190 }\r
 191 \r
 192 void QCameraControllerWidget::MceoFocusComplete()\r
 193 {\r
 194     // CameraEngine state is EEngineIdle\r
 195     emit logMessage("Focused");\r
 196 \r
 197     // Capture picture after it has focused\r
 198     iCameraWrapper->StopViewFinder();\r
 199     TRAPD(err,iCameraWrapper->CaptureL());\r
 200     if (err)\r
 201     {\r
 202         emit logMessage("Camera capture error");\r
 203     }\r
 204 }\r
 205 \r
 206 void QCameraControllerWidget::MceoCapturedDataReady( TDesC8* aData )\r
 207 {\r
 208 \r
 209 }\r
 210 \r
 211 void QCameraControllerWidget::MceoCapturedBitmapReady( CFbsBitmap* aBitmap )\r
 212 {\r
 213     if (iBackBufferContext)\r
 214     {\r
 215         emit logMessage("Succesfull capture");\r
 216 \r
 217         QPixmap pix(QPixmap::fromSymbianCFbsBitmap(aBitmap));\r
 218         emit imageCaptured(pix.toImage());\r
 219 \r
 220         TSize finderSize;\r
 221         finderSize.iHeight = this->geometry().height();\r
 222         finderSize.iWidth = this->geometry().width();\r
 223         TRAPD(err2,iCameraWrapper->StartViewFinderL(finderSize));\r
 224         if (err2)\r
 225         {\r
 226             emit logMessage("Camera start viewfinder error");\r
 227             return;\r
 228         }\r
 229     }\r
 230     if (iCameraWrapper)\r
 231         iCameraWrapper->ReleaseImageBuffer();\r
 232 }\r
 233 \r
 234 void QCameraControllerWidget::MceoViewFinderFrameReady( CFbsBitmap& aFrame )\r
 235 {\r
 236     if (iBackBufferContext)\r
 237     {\r
 238         TSize bmpSizeInPixels = aFrame.SizeInPixels();\r
 239         TInt xDelta = 0;\r
 240         TInt yDelta = 0;\r
 241         TPoint pos( xDelta, yDelta );\r
 242 \r
 243         // Copy received viewfinder picture to back buffer\r
 244         iBackBufferContext->BitBlt( pos, &aFrame, TRect( TPoint( 0, 0 ), bmpSizeInPixels ));\r
 245 \r
 246         // Update backbuffer into screen \r
 247         update();\r
 248     }\r
 249     if (iCameraWrapper)\r
 250         iCameraWrapper->ReleaseViewFinderBuffer();\r
 251 }\r
 252 \r
 253 void QCameraControllerWidget::MceoHandleError( TCameraEngineError aErrorType, TInt aError )\r
 254 {\r
 255     // NOTE: CameraEngine state seems to go into CCameraEngine::EEngineIdle state\r
 256 \r
 257     if (aErrorType == EErrReserve)\r
 258     {\r
 259         return; //-18 comes on application startup, but everything works ok\r
 260     }\r
 261 \r
 262     switch (aErrorType)\r
 263     {\r
 264     case EErrReserve:\r
 265     {\r
 266         emit logMessage("Camera reserved error");\r
 267         break;\r
 268     }\r
 269     case EErrPowerOn:\r
 270     {\r
 271         emit logMessage("Camera power on error");\r
 272         break;\r
 273     }\r
 274     case EErrViewFinderReady:\r
 275     {\r
 276         emit logMessage("Camera viewfinder error");\r
 277         break;\r
 278     }\r
 279     case EErrImageReady:\r
 280     {\r
 281         emit logMessage("Camera image ready error");\r
 282         break;\r
 283     }\r
 284     case EErrAutoFocusInit:\r
 285     case EErrAutoFocusMode:\r
 286     case EErrAutoFocusArea:\r
 287     case EErrAutoFocusRange:\r
 288     case EErrAutoFocusType:\r
 289     case EErrOptimisedFocusComplete:\r
 290     {\r
 291         //emit logMessage("Try focusing again");\r
 292         break;\r
 293     }\r
 294     default:\r
 295     {\r
 296         emit logMessage("Unknown error");\r
 297         break;\r
 298     }\r
 299     };\r
 300 \r
 301     // Try handle error\r
 302     //CancelCapturedPicture(EFalse);\r
 303     //    iAppUi->UseOptionsExitCbaL();\r
 304 }\r
 305 \r
 306 void QCameraControllerWidget::MceoHandleOtherEvent( const TECAMEvent& /*aEvent*/ )\r
 307 {\r
 308 }\r
 309 \r
 310 //Timer slot\r
 311 void QCameraControllerWidget::sendBackbufferToDecode()\r
 312 {\r
 313     if(!iBackBuffer)\r
 314         return;\r
 315 \r
 316     QPixmap pix(QPixmap::fromSymbianCFbsBitmap(iBackBuffer));\r
 317     emit imageCaptured(pix.toImage());\r
 318 \r
 319     if(timer)\r
 320         timer->start(500);\r
 321 }\r
 322 \r